Journals can be for anything...read some of the others to see want people post.... from the basic list of what they ate to current philosophy on life. http://forum.lowcarber.org/forumdisplay.php?f=36

There are also some fantastic success stories here for inspiration http://forum.lowcarber.org/forumdisplay.php?f=86 on DietDoctor, and some of the low carb Facebook pages